Pressure gauge for pumps, particularly hand pumps for bicycles, motorcycles or the like

Abstract

Pressure gauge for pumps, particularly hand pumps for bicycles, motorcycles or the like, including a cylinder sealingly connected between the outlet of the pump and the coupling for the valve of the tire; a piston is mounted inside the cylinder so that it can move in contrast with an elastic lamina and is connected to a rack which meshes with a rotatable sprocket with which a radial protrusion, provided with a pointer for indicating the pressure on a granduated scale, is rigidly associated.

I claim: 
     
       1. Pressure gauge for pumps, particularly hand pumps for bicycles, motorcycles or the like, comprising; a coupling for connection to a valve of a tire; a cylinder sealingly connectable between an outlet of the pump and said coupling; a piston mounted inside said cylinder; a rack to which said piston is connected; elastic means associated with said rack; a rotatable sprocket with which said rack meshes; a radial protrusion rigidly associated with said rotatable sprocket, said radial protrusion ending with a pointer, said pointed indicating the pressure on a gradated scale, wherein said elastic means are constituted by a lamina having a zigzag shape, said lamina being rigidly associated with said rack, said pressure gauge being obtained by molding a plastic material.